diff --git a/modules/utils/src/main/java/org/springside/modules/constants/CharSets.java b/modules/utils/src/main/java/org/springside/modules/constants/CharSets.java
index d42b4cdf..229f9296 100644
--- a/modules/utils/src/main/java/org/springside/modules/constants/CharSets.java
+++ b/modules/utils/src/main/java/org/springside/modules/constants/CharSets.java
@@ -3,7 +3,7 @@ package org.springside.modules.constants;
 import java.nio.charset.Charset;
 
 /**
- * JDK7可使用java.nio.charset.StandardCharsets
+ * JDK7可直接使用java.nio.charset.StandardCharsets.
  * 
  * @author calvin
  *
diff --git a/modules/utils/src/main/java/org/springside/modules/constants/MediaTypes.java b/modules/utils/src/main/java/org/springside/modules/constants/MediaTypes.java
index 8df7e839..7ed869b5 100644
--- a/modules/utils/src/main/java/org/springside/modules/constants/MediaTypes.java
+++ b/modules/utils/src/main/java/org/springside/modules/constants/MediaTypes.java
@@ -8,7 +8,8 @@ package org.springside.modules.constants;
 /**
  * 带UTF-8 charset 定义的MediaType.
  * 
- * Jax-RS和Spring的MediaType没有UTF-8的版本，
+ * Jax-RS和Spring的MediaType没有UTF-8的版本;
+ * 
  * Google的MediaType必须再调用toString()函数而不是常量，不能用于Restful方法的annotation。
  * 
  * @author calvin
diff --git a/modules/utils/src/main/java/org/springside/modules/utils/Collections3.java b/modules/utils/src/main/java/org/springside/modules/utils/Collections3.java
index 0f0e5a48..dfcf267c 100644
--- a/modules/utils/src/main/java/org/springside/modules/utils/Collections3.java
+++ b/modules/utils/src/main/java/org/springside/modules/utils/Collections3.java
@@ -22,6 +22,12 @@ import org.apache.commons.lang3.StringUtils;
  * 
  * 函数主要由两部分组成，一是自反射提取元素的功能，二是源自Apache Commons Collection, 争取不用在项目里引入它。
  * 
+ * 另请直接使用:
+ * 
+ * JDK Collections的SingletonMap/SingletonList/EmptyMap/EmptyList/EmptyMap
+ * 
+ * Guava Lists/Maps的newArrayLists(Element...elements)等函数
+ * 
  * @author calvin
  */
 public class Collections3 {
@@ -76,7 +82,8 @@ public class Collections3 {
 	 * @param propertyName 要提取的属性名.
 	 * @param separator 分隔符.
 	 */
-	public static String extractToString(final Collection collection, final String propertyName, final String separator) {
+	public static String extractToString(final Collection collection, final String propertyName,
+			final String separator) {
 		List list = extractToList(collection, propertyName);
 		return StringUtils.join(list, separator);
 	}